Packing-ring



E. R. NORMAN.

PACKING RING,

APPLICATION FILED NOV. 28, 1917.

1,345,804. ate t d uly 6, 1920.

Sb A J HUMM- a H R,

R H W R Imferdf t/X 1\ e M M el s: a A1 application filed November 28 191?.

1 be trim/o it only man/om lie it known that l llmmno Haitian, a citizen o'l the llnitcd States, rijasiding at Chicago, in the county of Cook and State of lllinois, hz' h invented certain new and useful lmproven'units in Packing-Rings, of which the following is a speciiicatioin retorence lieiligg' had therein to the accompanying drawings. ((jase do. ll)

:l'ly invea'ition relates to piston rings and consi ts ol' the matters herein described and pointed out in the appeui'led claims.

in the drawings in which similar re x once letters indicate the same or corres 'iondingparts,

Figure 1 is a side View of a ring constructed according to my invention;

Fig. 2 is a detail plan of the joint with the ends open;

Fig. 5 is a similar vieiv with the ring partly closed;

Figrf l is a entirely closed;

Fig. is a do of the joint on enlarged scale and I Fig. l a detail plan view of the parts of the joint on the inner face of the ring on an enlarged scale.

The ring ll. nz'ide from a blank preferably cut from a pot-eastinoof suitable metal, and split to forth a step-joint whose opposite pairs oi? abutting end surfaces are diagonally inclinedin the same direction at obtuse angles to the ciia'annterential or longitudinal dividing line of the joint of the ring and are provided with radially disposed co-acting tongues and shoulders extending in the longitiulinal line o l: the ring to make an adjustable seal or joint. The ends oi the 'rin; are formed with overlap ping tongues All A". he rccesss are symmetrically out through therii'iggj on opposite sides to the final line of division of "the ring, and the ends of the ring are undercut on the inner surface in extension of the lower portions oi the recesses to form external respectively, Whose. in

similar view with the in;

tail side view of the parts one and of the ring; on an shoulders I and 5a .ner faces provide elongated seats 7), 7/" re spectively, and whose Front ends (3 F), re spectively, are formed dia 'onally in seven ing the blank to niakc the oint. The bases of the tongues are of the same thickness as the ring. as shownat it. A, and their end portions are reduced in thickness by cuttii away part of their'outer faces to Patented July ll,

set

Serial No. 264.311.

torn] elongated seats a, a, which respectively co-act with the seats 7), b of the shoulders to form longitudinally extended seals. The bases of the reduced ends of the tongues are cut diagonally as at a and a in severing the blank, to correspond With the diagonal ends 5 7)" respectively of the shoulders S, S. lhe diagonally abutting opposite pairs of end surfaces (6 b and o" 7) are produced by cutting the blank on spaced diagonal lines which extend symmetrically and preferably equally into the Width oi the ring on opposite sides or margii'is of the blank in parallel planes at equal. distances from the final transverse dividing line and obtuse angles to the circumferential or liiingitudinal line of division at the joint, the inner walls of the recesses being; out along the median line to a common radial plane to sever the ring,

the joint thus being; formed upon a compound line composed of the pair of spaced parallel diijigonal lines :0, a7 and the inter- :mediate eircun'ilerential joint-dividing: line :n as shown for example in Fig. 4. The tips oi the tongues are beveled as at a so tl it they-Krill not catch on the edges of the shoulders when entering; the seats 7), l), and the bases o 1 these seats are beveled or inclined at 7) to correspond with the beveled tips of the tongues, the seats I), 6' being slightly longer than the seats a, a to afford clearance l'or the tips of the latter but having their bases fitting the tips close enough to prevent an oil pocket at this point to produce carbon by the heat of the engine.

The seats 7) are cut or beveled as at 72 so they are Wider at their bases as shown in Fig. 6 to prevent the point of the coaoting' tongue being in contact with the side of the seat so that the points will not break by crystallization. arising from vibration of the engine.

The collating; seats on the tongues and shoulders have a. longitudinally extended seal Whether the ring is closed or expanded.

lly my invention the ring is provided with a step-joint having abutting: ends diagonal at obtuse angles to the circumferential or longitudinalline of division of the joint and provided With radizilly disposed co-actingz tongue" and shoulders having" longitudinally extended contart. lliagonally cut joints of this character have certain advantages as for example they allow the ends of the ring to overlap or pass to obvi- I ate the tendency of the tongues to break of? associated cylinder when the ring expands.

by heat, but they have the disadvantage that they allow the joint to open when the ring wears or is in an oversized cylinder. Radially out or step-joints allow the fluid, as the gas in an internal combustion engine, to pass across the inside of the ringat the joint when the ring wears or is in an oversized cylinder, and they do not permit the ends to pass or overlap when closing the ring 'or when it expands by heat. My invention avoids each of these objectionsg it affords tightness of the joint due to the extended seal, and allows the ends to overlap or pass due to the diagonal. abutment of their meeting surfaces at obtuse angles to the circumferential or longitudinal line of division of the joint; the advantages of the diagonal joint are preserved by the diagonal abutment of its ends, and the opening of the joint is prevented by the co-acting surfaces of the tongues and shoulders. These surfaces are cut on any suitable lines so that they, extend longitudinally or in the plane of the ring, and the ends of the tongues preferably are thicker radially than the bases of their cooperating shoulders as clearly shown in Figs. 1 and 5 to aliord in creased strength to the tongues,

I claim 1 A- packing-ring having a step-joint formed by two meeting ends, the abutting portions of the joint being diagonal at obtuse angles to the circumferential line of division of the joint and provideo with radi ally disposed oo acting tongues and shoul-- essee i ders on opposite sides of its median line and having longitudlnally extended cooperating bearing surfaces forming longitudinally extended seals.

2. A packingring having a joint formed by two meeting ends, each end being cutaway to form an outer shoulder and an inner tongue on opposite sides of its median line and having longitudinally extended cooperating seats, the abutting portions of the tongues and shoulders being diagonal to the width of the ring at obtuse angles to the circumferential line of division of the joint, and the tips of the tongues being beveled.

A packing-ring having a joint formed by two meeting ends, each end being cutaway to form an outer shoulder and an inner tongue on opposite sides of its median line, the end of the tongue being of less width than the base of its cooperating shoulder, and the tips of the tongues being beveled;

4. A packing-ring having its joint formed by two meeting ends, each end being cutaway to form an outer shoulder and an inner tongue on opposite sides of its median line, the ends of the tongues being of greater radial thickness than the cooperating bases oi their shoulders; and the abut ting portions of the tongues and shoulders being diagonal. to the width of the ring at obtuse angles to the circumferential line of division 01'? the oint.

In testimony whereof I aiiix my signature in presence of two witnesses. EDWARD lt. NQltll lAN. Witn esses Amos B. lVnI'r'rLn, J, Moltonnn'rs. 

